Consolidate win/x dispatchers

ui/views/controls/menu/menu_controller.h

Index: ui/views/controls/menu/menu_controller.h
diff --git a/ui/views/controls/menu/menu_controller.h b/ui/views/controls/menu/menu_controller.h
index f8bb62e279e92bfc8a579849d7b136bad14274ba..4376b7581a5dadd6eb09dfd07dea1ba7f155279e 100644
--- a/ui/views/controls/menu/menu_controller.h
+++ b/ui/views/controls/menu/menu_controller.h
@@ -238,13 +238,10 @@ class VIEWS_EXPORT MenuController : public MessageLoop::Dispatcher {
                                  const LocatedEvent& event);
   void StartDrag(SubmenuView* source, const gfx::Point& location);
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(USE_AURA)
   // Dispatcher method. This returns true if the menu was canceled, or
   // if the message is such that the menu should be closed.
-  virtual bool Dispatch(const MSG& msg) OVERRIDE;
-#elif defined(USE_AURA)
-  virtual base::MessagePumpDispatcher::DispatchStatus Dispatch(
-      XEvent* xevent) OVERRIDE;
+  virtual bool Dispatch(const base::NativeEvent& event) OVERRIDE;
 #endif
 
   // Key processing. The return value of this is returned from Dispatch.